72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
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/* cutils/ashmem.h
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**
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** Copyright 2008 The Android Open Source Project
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**
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** This file is dual licensed. It may be redistributed and/or modified
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** under the terms of the Apache 2.0 License OR version 2 of the GNU
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** General Public License.
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*/
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#ifndef _CUTILS_ASHMEM_H
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#define _CUTILS_ASHMEM_H
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int ashmem_create_region(const char *name, size_t size);
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int ashmem_set_prot_region(int fd, int prot);
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int ashmem_pin_region(int fd, size_t offset, size_t len);
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int ashmem_unpin_region(int fd, size_t offset, size_t len);
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int ashmem_get_size_region(int fd);
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#ifdef __cplusplus
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}
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#endif
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#ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */
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#define ASHMEM_NAME_LEN 256
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#define ASHMEM_NAME_DEF "dev/ashmem"
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/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
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#define ASHMEM_NOT_PURGED 0
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#define ASHMEM_WAS_PURGED 1
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/* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
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#define ASHMEM_IS_UNPINNED 0
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#define ASHMEM_IS_PINNED 1
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#if LINUX_ENABLED
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#include <linux/limits.h>
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#include <linux/ioctl.h>
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#include <linux/types.h>
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struct ashmem_pin {
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__u32 offset;
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__u32 len;
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};
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#define __ASHMEMIOC 0x77
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#define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
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#define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
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#define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
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#define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
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#define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
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#define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
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#define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
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#define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
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#define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
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#define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)
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#endif /* LINUX_ENABLED */
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#endif /* ! __ASHMEMIOC */
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#endif /* _CUTILS_ASHMEM_H */
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